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/* vi: ts=8 sts=4 sw=4
*
* This file is part of the KDE project, module kdesu.
* Copyright (C) 1998 Pietro Iglio <iglio@fub.it>
* Copyright (C) 1999,2000 Geert Jansen <jansen@kde.org>
*/
#include <config-runtime.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <pwd.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/resource.h>
#if defined(HAVE_SYS_WAIT_H)
#include <sys/wait.h>
#endif
#include <QFileInfo>
#include <QFile>
#include <QtDBus/QtDBus>
#include <kdebug.h>
#include <kglobal.h>
#include <kapplication.h>
#include <kstandarddirs.h>
#include <kconfig.h>
#include <klocale.h>
#include <kaboutdata.h>
#include <kcmdlineargs.h>
#include <kmessagebox.h>
#include <kuser.h>
#include <kshell.h>
#include <kstartupinfo.h>
#include <kdefakes.h>
#include <kwindowsystem.h>
#include <kdesu/defaults.h>
#include <kdesu/su.h>
#include <kdesu/client.h>
#include "sudlg.h"
#define ERR strerror(errno)
QByteArray command;
const char *Version = "1.0";
// NOTE: if you change the position of the -u switch, be sure to adjust it
// at the beginning of main()
#if 0
// D-BUS has no equivalent
QByteArray dcopNetworkId()
{
QByteArray result;
result.resize(1025);
QFile file(DCOPClient::dcopServerFile());
if (!file.open(QIODevice::ReadOnly))
return "";
int i = file.readLine(result.data(), 1024);
if (i <= 0)
return "";
result.data()[i-1] = '\0'; // strip newline
return result;
}
#endif
static int startApp();
int main(int argc, char *argv[])
{
// FIXME: this can be considered a poor man's solution, as it's not
// directly obvious to a gui user. :)
// anyway, i vote against removing it even when we have a proper gui
// implementation. -- ossi
QByteArray duser = qgetenv("ADMIN_ACCOUNT");
if (duser.isEmpty())
duser = "root";
KAboutData aboutData("kdesu", 0, ki18n("KDE su"),
Version, ki18n("Runs a program with elevated privileges."),
KAboutData::License_Artistic,
ki18n("Copyright (c) 1998-2000 Geert Jansen, Pietro Iglio"));
aboutData.addAuthor(ki18n("Geert Jansen"), ki18n("Maintainer"),
"jansen@kde.org", "http://www.stack.nl/~geertj/");
aboutData.addAuthor(ki18n("Pietro Iglio"), ki18n("Original author"),
"iglio@fub.it");
aboutData.setProgramIconName("dialog-password");
KCmdLineArgs::init(argc, argv, &aboutData);
// NOTE: if you change the position of the -u switch, be sure to adjust it
// at the beginning of main()
KCmdLineOptions options;
options.add("!+command", ki18n("Specifies the command to run as separate arguments"));
options.add("c <command>", ki18n("Specifies the command to run as one string"));
options.add("f <file>", ki18n("Run command under target uid if <file> is not writable"));
options.add("u <user>", ki18n("Specifies the target uid"), duser);
options.add("n", ki18n("Do not keep password"));
options.add("s", ki18n("Stop the daemon (forgets all passwords)"));
options.add("t", ki18n("Enable terminal output (no password keeping)"));
options.add("p <prio>", ki18n("Set priority value: 0 <= prio <= 100, 0 is lowest"), "50");
options.add("r", ki18n("Use realtime scheduling"));
options.add("noignorebutton", ki18n("Do not display ignore button"));
options.add("i <icon name>", ki18n("Specify icon to use in the password dialog"));
options.add("d", ki18n("Do not show the command to be run in the dialog"));
#ifdef Q_WS_X11
/* KDialog originally used --embed for attaching the dialog box. However this is misleading and so we changed to --attach.
* For consistancy, we silently map --embed to --attach */
options.add("attach <winid>", ki18nc("Transient means that the kdesu app will be attached to the app specified by the winid so that it is like a dialog box rather than some separate program", "Makes the dialog transient for an X app specified by winid"));
options.add("embed <winid>");
#endif
KCmdLineArgs::addCmdLineOptions(options);
//KApplication::disableAutoDcopRegistration();
// kdesu doesn't process SM events, so don't even connect to ksmserver
QByteArray session_manager = qgetenv( "SESSION_MANAGER" );
if (!session_manager.isEmpty())
unsetenv( "SESSION_MANAGER" );
KApplication app;
// but propagate it to the started app
if (!session_manager.isEmpty())
setenv( "SESSION_MANAGER", session_manager.data(), 1 );
{
#ifdef Q_WS_X11
KStartupInfoId id;
id.initId( kapp->startupId());
id.setupStartupEnv(); // make DESKTOP_STARTUP_ID env. var. available again
#endif
}
int result = startApp();
if (result == 127)
{
KMessageBox::sorry(0, i18n("Cannot execute command '%1'.", QString::fromLocal8Bit(command)));
}
if (result == -2)
{
KMessageBox::sorry(0, i18n("Cannot execute command '%1'. It contains invalid characters.", QString::fromLocal8Bit(command)));
}
return result;
}
static int startApp()
{
KCmdLineArgs *args = KCmdLineArgs::parsedArgs();
// Stop daemon and exit?
if (args->isSet("s"))
{
KDEsuClient client;
if (client.ping() == -1)
{
kError(1206) << "Daemon not running -- nothing to stop\n";
exit(1);
}
if (client.stopServer() != -1)
{
kDebug(1206) << "Daemon stopped\n";
exit(0);
}
kError(1206) << "Could not stop daemon\n";
exit(1);
}
QString icon;
if ( args->isSet("i"))
icon = args->getOption("i");
bool prompt = true;
if ( args->isSet("d"))
prompt = false;
// Get target uid
QByteArray user = args->getOption("u").toLocal8Bit();
QByteArray auth_user = user;
struct passwd *pw = getpwnam(user);
if (pw == 0L)
{
kError(1206) << "User " << user << " does not exist\n";
exit(1);
}
bool other_uid = (getuid() != pw->pw_uid);
bool change_uid = other_uid;
if (!change_uid) {
char *cur_user = getenv("USER");
if (!cur_user)
cur_user = getenv("LOGNAME");
change_uid = (!cur_user || user != cur_user);
}
// If file is writeable, do not change uid
QString file = args->getOption("f");
if (other_uid && !file.isEmpty())
{
if (file.at(0) != '/')
{
KStandardDirs dirs;
file = dirs.findResource("config", file);
if (file.isEmpty())
{
kError(1206) << "Config file not found: " << file << "\n";
exit(1);
}
}
QFileInfo fi(file);
if (!fi.exists())
{
kError(1206) << "File does not exist: " << file << "\n";
exit(1);
}
change_uid = !fi.isWritable();
}
// Get priority/scheduler
QString tmp = args->getOption("p");
bool ok;
int priority = tmp.toInt(&ok);
if (!ok || (priority < 0) || (priority > 100))
{
KCmdLineArgs::usageError(i18n("Illegal priority: %1", tmp));
exit(1);
}
int scheduler = SuProcess::SchedNormal;
if (args->isSet("r"))
scheduler = SuProcess::SchedRealtime;
if ((priority > 50) || (scheduler != SuProcess::SchedNormal))
{
change_uid = true;
auth_user = "root";
}
// Get command
if (args->isSet("c"))
{
command = args->getOption("c").toLocal8Bit();
// Accepting additional arguments here is somewhat weird,
// but one can conceive use cases: have a complex command with
// redirections and additional file names which need to be quoted
// safely.
}
else
{
if( args->count() == 0 )
{
KCmdLineArgs::usageError(i18n("No command specified."));
exit(1);
}
}
for (int i = 0; i < args->count(); i++)
{
command += ' ';
command += QFile::encodeName(KShell::quoteArg(args->arg(i)));
}
// Don't change uid if we're don't need to.
if (!change_uid)
{
int result = system(command);
result = WEXITSTATUS(result);
return result;
}
// Check for daemon and start if necessary
bool just_started = false;
bool have_daemon = true;
KDEsuClient client;
if (!client.isServerSGID())
{
kWarning(1206) << "Daemon not safe (not sgid), not using it.\n";
have_daemon = false;
}
else if (client.ping() == -1)
{
if (client.startServer() == -1)
{
kWarning(1206) << "Could not start daemon, reduced functionality.\n";
have_daemon = false;
}
just_started = true;
}
// Try to exec the command with kdesud.
bool keep = !args->isSet("n") && have_daemon;
bool terminal = args->isSet("t");
bool withIgnoreButton = args->isSet("ignorebutton");
int winid = -1;
bool attach = args->isSet("attach");
if(attach) {
winid = args->getOption("attach").toInt(&attach, 0); //C style parsing. If the string begins with "0x", base 16 is used; if the string begins with "0", base 8 is used; otherwise, base 10 is used.
if(!attach)
kWarning(1206) << "Specified winid to attach to is not a valid number";
} else if(args->isSet("embed")) {
/* KDialog originally used --embed for attaching the dialog box. However this is misleading and so we changed to --attach.
* For consistancy, we silently map --embed to --attach */
attach = true;
winid = args->getOption("embed").toInt(&attach, 0); //C style parsing. If the string begins with "0x", base 16 is used; if the string begins with "0", base 8 is used; otherwise, base 10 is used.
if(!attach)
kWarning(1206) << "Specified winid to attach to is not a valid number";
}
QList<QByteArray> env;
QByteArray options;
env << ( "DESKTOP_STARTUP_ID=" + kapp->startupId());
if (pw->pw_uid)
{
// Only propagate KDEHOME for non-root users,
// root uses KDEROOTHOME
// Translate the KDEHOME of this user to the new user.
QString kdeHome = KGlobal::dirs()->relativeLocation("home", KGlobal::dirs()->localkdedir());
if (kdeHome[0] != '/')
kdeHome.prepend("~/");
else
kdeHome.clear(); // Use default
env << ("KDEHOME="+ QFile::encodeName(kdeHome));
}
KUser u;
env << (QByteArray) ("KDESU_USER=" + u.loginName().toLocal8Bit());
if (keep && !terminal && !just_started)
{
client.setPriority(priority);
client.setScheduler(scheduler);
int result = client.exec(command, user, options, env);
if (result == 0)
{
result = client.exitCode();
return result;
}
}
// Set core dump size to 0 because we will have
// root's password in memory.
struct rlimit rlim;
rlim.rlim_cur = rlim.rlim_max = 0;
if (setrlimit(RLIMIT_CORE, &rlim))
{
kError(1206) << "rlimit(): " << ERR << "\n";
exit(1);
}
// Read configuration
KConfigGroup config(KGlobal::config(), "Passwords");
int timeout = config.readEntry("Timeout", defTimeout);
// Check if we need a password
SuProcess proc;
proc.setUser(auth_user);
int needpw = proc.checkNeedPassword();
if (needpw < 0)
{
QString err = i18n("Su returned with an error.\n");
KMessageBox::error(0L, err);
exit(1);
}
if (needpw == 0)
{
keep = 0;
kDebug() << "Don't need password!!\n";
}
for (const QChar character : QString::fromLocal8Bit(command)) {
if (!character.isPrint() && character.category() != QChar::Other_Surrogate) {
return -2;
}
}
// Start the dialog
QString password;
if (needpw)
{
#ifdef Q_WS_X11
KStartupInfoId id;
id.initId( kapp->startupId());
KStartupInfoData data;
data.setSilent( KStartupInfoData::Yes );
KStartupInfo::sendChange( id, data );
#endif
KDEsuDialog dlg(user, auth_user, keep && !terminal, icon, withIgnoreButton);
if (prompt)
dlg.addCommentLine(i18n("Command:"), QFile::decodeName(command));
if (defKeep)
dlg.setKeepPassword(true);
if ((priority != 50) || (scheduler != SuProcess::SchedNormal))
{
QString prio;
if (scheduler == SuProcess::SchedRealtime)
prio += i18n("realtime: ");
prio += QString("%1/100").arg(priority);
if (prompt)
dlg.addCommentLine(i18n("Priority:"), prio);
}
//Attach dialog
#ifdef Q_WS_X11
if(attach)
KWindowSystem::setMainWindow(&dlg, (WId)winid);
#endif
int ret = dlg.exec();
if (ret == KDEsuDialog::Rejected)
{
#ifdef Q_WS_X11
KStartupInfo::sendFinish( id );
#endif
exit(1);
}
if (ret == KDEsuDialog::AsUser)
change_uid = false;
password = dlg.password();
keep = dlg.keepPassword();
#ifdef Q_WS_X11
data.setSilent( KStartupInfoData::No );
KStartupInfo::sendChange( id, data );
#endif
}
// Some events may need to be handled (like a button animation)
kapp->processEvents();
// Run command
if (!change_uid)
{
int result = system(command);
result = WEXITSTATUS(result);
return result;
}
else if (keep && have_daemon)
{
client.setPass(password.toLocal8Bit(), timeout);
client.setPriority(priority);
client.setScheduler(scheduler);
int result = client.exec(command, user, options, env);
if (result == 0)
{
result = client.exitCode();
return result;
}
} else
{
SuProcess proc;
proc.setTerminal(terminal);
proc.setErase(true);
proc.setUser(user);
proc.setEnvironment(env);
proc.setPriority(priority);
proc.setScheduler(scheduler);
proc.setCommand(command);
int result = proc.exec(password.toLocal8Bit());
return result;
}
return -1;
}
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